What this MCCB does on the line
The Siemens SENTRON 3VA2110-5JQ32-0DL0 is a 3-pole molded case circuit breaker (MCCB) rated for line-protection duty. Its full-scale current is 100 A, and it carries that rating flat across the ambient range from 40 °C to 70 °C — no derating needed in a warm panel. The interrupting capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA figure at 240 V means it can safely clear a bolted fault on a low-voltage distribution transformer secondary without the arc flashing over to adjacent gear — a key spec for high-fault-capacity service-entrance or sub-distribution boards. It ships with an undervoltage release (UVR) fitted, plus a complement of auxiliary switches: two auxiliary switches, one trip-alarm switch, and one electrical-alarm switch (HQ type). The UVR is a common requirement on safety circuits — if the control voltage drops, the breaker trips, preventing a motor from re-accelerating after a power dip. The communication function allows integration into a monitoring or energy-management system, so this breaker can report status and alarms over a bus rather than relying on hardwired pilot lights.
Panel fit and wiring
Dimensions: 181 mm high, 105 mm wide, 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for this frame size — it fits existing SENTRON mounting bases and busbar systems without panel modification. The depth of 86 mm is shallow enough for most 200 mm deep enclosures; verify gland-plate clearance if the breaker is mounted near the rear wall. Spring-cage terminals accept 0.2–2.5 mm² solid or ferruled stranded; strip length 8 mm avoids whiskers under the cage.
What to know about the auxiliary release
The fitted undervoltage release (UVR) means the breaker trips when the control voltage falls below a threshold — typically 35–70% of rated voltage. If your application does not require a UVR (e.g., a UPS-backed circuit where you want the breaker to stay closed through a sag), you would order a variant without it. The auxiliary switch complement (2 aux + 1 trip alarm + 1 electrical alarm) provides enough dry contacts for remote status indication and a separate alarm for fault events.